1. Cook the rice according to package instructions and set aside.
2. Season the chicken breast with chili powder, cumin, garlic powder, oregano, paprika, salt, and pepper.
3. Heat oil in a skillet over medium-high heat and cook the chicken until fully cooked and slightly charred. Remove from skillet and let it rest.
4. In the same skillet, add sliced bell peppers and onions, cooking until tender and slightly charred.
5. Slice the cooked chicken into thin strips.
6. If using black beans and corn, heat them in a small pan until warm.
7. In a mixing bowl, toss cooked rice with chopped cilantro and a squeeze of lime juice.
8. Assemble the bowls by layering rice at the base.
9. Top with sliced chicken, sautéed bell peppers, onions, black beans, and corn.
10. Add cheese, guacamole, sour cream, salsa, and more cilantro as toppings.
11. Serve with lime wedges on the side.
12. Optional: Serve with warm tortillas for an extra touch.
13. Enjoy your homemade Chicken Fajita Rice Bowl!